Natural durability of Erythrophleum fordii Oliver against white rot fungi
10:30 - 09/04/2019
Natural durability of the culturally and historically important timber: Erythrophleum fordii wood against white-rot fungi
Shrinkage and swelling behavior of archaeological waterlogged wood preserved with slightly crosslinked sodium polyacrylate
Shrinkage and swelling behavior of archaeological waterlogged wood treated with polyacrylic acid resin
Natural durability of Erythrophleum fordii Oliver against white rot fungi Conference Paper
Author: Thanh Duc Nguyen, Hiroshi Nishimura, Tomoya Imai, Takashi Watanabe
Abstract
The durability of Erythrophleum fordii Oliver and Fagus crenata Blume against white rot fungi was investigated. The results showed that all fungi caused less than 2% mass loss in E. fordii wood, meanwhile, this value ranged from 2% to 14% in beech wood after 4 weeks of exposure. Chemical analysis showed large difference in lignin contents of two wood species. The lignin content of E. fordii wood reached about 33.4% meanwhile the value was only 20.8% for beech wood. The degradation of E. fordii was so little to observe under an optical microscope that SEM was applied for visual inspection. Interestingly, the hyphae were only observed in vessels and parenchyma cells of E. fordii wood, while the fibres remained undamaged. On the other hand, the hyphae were extended over whole tissues in beech wood. The E. fordii wood fiber was found to be highly lignified thick-walled fibers with fiber lumina almost completely closed. The presence of such unique fibers must be one of reasons for the high natural resistance of E. fordii